/*
 * Copyright (C) 2005-present, 58.com.  All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.wuba.wlock.server.communicate.registry.handler;

import com.wuba.wlock.common.registry.protocol.MessageType;
import com.wuba.wlock.common.registry.protocol.RegistryProtocol;

public abstract class AbstractPaxosHandler {
	public boolean doHandler(RegistryProtocol registryProtocol) throws Exception {
		if (registryProtocol == null) {
			return false;
		}
		if (!checkProtocol(registryProtocol.getOpaque())) {
			return false;
		}
		if (MessageType.SUCCESS == registryProtocol.getMsgType()) {
			return doSuccess(registryProtocol);
		} else if (MessageType.ERROR == registryProtocol.getMsgType()) {
			return doError(registryProtocol);
		} else {
			return doElse(registryProtocol);
		}
	}

	protected abstract boolean checkProtocol(byte opaque);

	public abstract boolean doSuccess(RegistryProtocol registryProtocol) throws Exception;

	public abstract boolean doError(RegistryProtocol registryProtocol);

	public abstract boolean doElse(RegistryProtocol registryProtocol);
}
